Annabergite and Andalusite Physical Properties

Annabergite

Andalusite

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1 Physical Properties

1.1 Tenacity

Sectile

Not Available

1.2 Solubility

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

3.07

3.05-3.21

1.5 Fracture

Brittle, Metallic, Brittle, Metallic, Brittle, Metallic

Uneven, Subconchoidal, Uneven, Subconchoidal, Splintery, UnevenArthur Thomas, Gemstones (2009)

1.6 Cleavage

Perfect on {010}, indistinct on {100} and {102}

Good on {110}, poor on {100}

1.7 Mohs Hardness

7.5

1.8 Chemical Composition

Ni3(AsO4)2•8(H2O)

Al 2SiO 5Michael OâDonoghue , Gems, Sixth edition (2006) More from other references

Annabergite and Andalusite Chemical Formula

While comparing Annabergite and Andalusite physical properties, the important data you should know is its chemical composition. Since chemical formula defines the molecular structure of the crystal, most of the physical properties like color, tenacity, solubility are governed by Annabergite and Andalusite chemical formula.

Chemical formula of Annabergite- Ni3(AsO4)2•8(H2O)
Chemical formula of Andalusite- Al 2SiO 5Michael OâDonoghue , Gems, Sixth edition (2006) More from other references

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Annabergite and Andalusite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Annabergite and Andalusite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Annabergite and Andalusite Optical Properties during the identification of gemstone. Specific gravity of Annabergite is 3.05-3.21 whereas that of Andalusite is 3.05-3.21.